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Oracle

Clemens Bleile

Oracle DML (DELETE) and the Index Clustering Factor

By | Oracle | No Comments

As a consultant working for customers, I’m often in the situation that I have an answer to a problem, but the recommended solution cannot be implemented due to some restrictions. E.g. the recommendation would be to adjust the code, but that is not feasible. In such cases you are forced to try to help without code changes. Recently I was confronted with the following issue: A process takes too long. Digging deeper I could see…

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Mouhamadou Diaw

Duplicate Database on ODA X4

By | Database Administration & Monitoring, Database management, Operation systems, Oracle | No Comments

The ODA X4 is still in use for some customers. The last time I was asked to validate the backups . Let me explain the context. Actually the backups are done via RMAN on local in a NFS share. After these backups are backep up by Netback on tape. The goal was just to validate that the backups done by Netback can be used to restore if needed. So the backup teams restored the backups…

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Franck Pachot

What is Object Storage?

By | AWS, Cloud, Oracle | No Comments

By Franck Pachot . I’ve always been working with databases. Before the cloud era, the most abstract term was “data”. A variable in memory is data. A file is data. A block of disk contains data. We often created a ‘/data’ directory to put everything that is not binaries and configuration files. I’ll always remember when I did that while working in Dakar. My colleagues were laughing for minutes – my Senegalese followers will understand…

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Mouhamadou Diaw

Oracle 20c Data Guard : Standardization of Client-Side Broker Files

By | Database Administration & Monitoring, Database management, Oracle | One Comment

In an Oracle 20c Data Guard environment with a broker configured we can have following files called client-side broker files -The observer configuration file : observer.ora -The observer log file -The observer runtime datafile: fsfo.dat -The fast-start failover callout scripts (new feature in Oracle 20c) Before Oracle 20c, there was no default location for these files. Starting with Oracle 20c, now we can define a default location for all these files by setting an environment…

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Franck Pachot

Troubleshooting performance on Autonomous Database

By | Oracle | No Comments

By Franck Pachot . On my Oracle Cloud Free Tier Autonomous Transaction Processing service, a database that can be used for free with no time limit, I have seen this strange activity. As I’m running nothing scheduled, I was surprised by this pattern and looked at it by curiosity. And I got the idea to take some screenshot to show you how I look at those things. The easiest performance tool available in the Autonomous…

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Mouhamadou Diaw

Reimaging an ODA to 19.8 Part II

By | Database Administration & Monitoring, Database management, Operation systems, Oracle | No Comments

In my previous blog, I described the steps to deploy an ODA 19.8 by reimaging. The ODA was reimaged with the latest available version 19.8 but some components were not up-to-dated. [[email protected] ~]# odacli describe-component System Version ————— 19.8.0.0.0 Component Installed Version Available Version —————————————- ——————– ——————– OAK 19.8.0.0.0 up-to-date GI 19.8.0.0.200714 up-to-date DCSAGENT 19.8.0.0.0 up-to-date ILOM 4.0.4.38.a.r132148 4.0.4.51.r134837 BIOS 52020500 52021300 OS 7.8 up-to-date FIRMWARECONTROLLER VDV1RL02 VDV1RL04 FIRMWAREDISK 1120 1102 HMP The patch was…

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Mouhamadou Diaw

Reimaging an ODA to 19.8 Part I

By | Database Administration & Monitoring, Operation systems, Oracle | No Comments

Recently I was deploying some ODA X8-2M. To install the 19.8 software, I decide to reimage the server with the 19.8 image. In this blog I describe the main steps I did. First, we will need to download following patches from Oracle support website -Patch 30403643: Oracle Database Appliance 19.8.0.0.0 OS ISO IMAGE for all platforms -Patch 30403673: Oracle Database Appliance GI Clone for ODACLI/DCS stack (and -Patch 30403662: Oracle Database Appliance RDBMS Clone for…

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Jérôme Dubar

Boost your CPU speed with Standard Edition 2 on ODA

By | Database Administration & Monitoring, Database management, Development & Performance, Hardware & Storage, Operation systems, Oracle | No Comments

Introduction There is no need to decrease the number of cores on your ODA when using Standard Edition 2, because your license is based on the number of physical CPU. So why would you do that? Obviously, the more cores you have, the more performance you should get. But that simply isn’t always true. Base CPU speed and Turbo Boost If you didn’t read my previous blog, please do so to understand how Xeon processors…

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Franck Pachot

SQL Server on Oracle Cloud

By | Cloud, Oracle, SQL Server | No Comments

By Franck Pachot . You can create a VM with SQL Server running in the Oracle Cloud. This is easy with a few clicks on the marketplace: Here are the steps I did above: Oracle Cloud -> Marketplace -> Application -> Category -> Database management You have multiple flavors. I’ve chosen the lastest cheaper “Microsoft SQL 2016 Standard with Windows Server 2016 Standard” Select the compartment and “Launch Instance” Choose a name, and the network…

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Lazhar Felahi

Oracle Data Pump Integration for Table instantiation with Oracle Golden Gate

By | Database Administration & Monitoring, Oracle | No Comments

From Oracle GoldenGate (OGG) version 12.2 and above, there is a transparent integration of OGG with Oracle Data Pump as explained in the Document ID 1276058.1. The CSN for each table is captured on an Oracle Data Pump export. The CSN is then applied to system tables and views on the target database on the import. These views and system tables are referenced by Replicat when applying data to target database. This 12.2 feature, no…

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